I. Application
High-quality metal halide lamps, discharge lamps, germicidal lamps, etc.
II. Product Features
Produced from high purity imported sand or domestically produced high purity sand, with high transmittance in the ultraviolet and infrared regions, very few surface lines and air bubbles, and extremely low OH(OH can be controlled below 0.5ppm) can extend lamp life.
III. Product Type
PQ181A/N，Quartz tubes for metal halide lamps
IV. Typical Size
| OD Range | ODTolerance | WallThickness | WTTolerance | Out ofRound | Siding | Bow |
| 3＜Ф≤10 | ±0.1 | 1～2.0 | ±15% | 2% | 12% | 0.15% |
| 10＜Ф≤20 | ±0.2 | 1～2.5 | ±15% | 1.25% | 12% | 0.15% |
| 20＜Ф≤30 | ±0.25 | 1.5～3.0 | ±15% | 1.25% | 12% | 0.15% |
| 30＜Ф≤40 | ±0.35 | 1.5～4.0 | ±15% | 1.25% | 12% | 0.15% |
| 40＜Ф≤50 | ±0.4 | 2.0～4.0 | ±15% | 1.25% | 12% | 0.15% |
| 50＜Ф≤60 | ±0.5 | 2.5～5.0 | ±15% | 1.25% | 12% | 0.15% |
V. Physical and Chemical Properties
i. Mechanical and Thermal Properties
| Density（20℃kg/m3） | Thermal Expansion（200-300℃℃-1） | Softening Point（℃） | Annealing Point（℃） | Strain Point（℃） |
| 2.2*103 | 5.6*10-7 | 1670 | 1210 | 1110 |
ii. Impurity Value
| Impurity | Na | K | Mg | Li | Ca | Fe | Al | Ti | Cu |
| Typicalvalue | 0.8 | 0.9 | 0.5 | 0.7 | 0.8 | 0.5 | 16.2 | 1.2 | 0.05 |
iii. OH Content
| Typical Value without Baking | After baking |
| 160 | ＜0.5, ＜1 |
iv. Optical Properties
